A left hand charging bolt
They should make a tactical bolt release that works with the AR magwell adapter.
Will you ever stock the bipod grip part no. 58-1-057B?
there is an issue of the bolt not locking back on the last round with the AR magwell adapter. If the follower in the mag is not all the way to the rear it will not enguage the bolt release and thus not lock back.

The Zahal CSA scope mount is a good start for mounting a little red dot or whatnot, but vz-58 owners have been chasing an off-the-shelf solution for POSP style optics for years.

Most AK and SVD products are unsuitable for the vz-58. They sit too high or do not line up over bore. As they are centered over the dust cover most magnified optics sit too far back. Many mounting options also lack a case deflector and people end up welding on some scrap steel to make it work. (case deflectors for the vz-58 exist but they are like unicorns here in Canada).

Is there any chance there could be a version of the Zahal CSA mount that is longer, sits a bit more forward, and has a built in case defector? There are currently very few off-the-shelf options when it comes to mounting a POSP or other magnified optics on these rifles in an ergonomic manner.